CN103792020A - Surface acoustic wave sensor frequency-temperature analytical time domain algorithm - Google Patents
Surface acoustic wave sensor frequency-temperature analytical time domain algorithm Download PDFInfo
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- CN103792020A CN103792020A CN201310568587.1A CN201310568587A CN103792020A CN 103792020 A CN103792020 A CN 103792020A CN 201310568587 A CN201310568587 A CN 201310568587A CN 103792020 A CN103792020 A CN 103792020A
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- temperature
- acoustic wave
- surface acoustic
- wave sensor
- frequency
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Abstract
The invention discloses a surface acoustic wave sensor frequency-temperature analytical time domain algorithm. The surface acoustic wave sensor frequency-temperature analytical time domain algorithm is characterized in that the surface acoustic wave sensor frequency-temperature analytical time domain algorithm comprises the following steps that: step 1, the natural frequency f0 of a surface acoustic wave sensor is determined; step 2, the reflection frequency f of the surface acoustic wave sensor is made to be equal to the natural frequency f0; step 3, a relationship between temperature and the reflection frequency is determined, and the relationship between the frequency of the surface acoustic wave sensor and the temperature can be represented by the formula that f0(T)=f0(T0)[1+a<f>(1)(T-T0)+a<f>(2)(T-T0)2+a<f>(3)(T-T0)3+...], wherein a<f>(i) w is an i-order temperature coefficient under a reference temperature T0; and step 4, a temperature value can be obtained according to the relationship between the temperature and the reflection frequency. With the surface acoustic wave sensor frequency-temperature analytical time domain algorithm adopted, temperature inside a switch cabinet can be analyzed according to the change of the frequency. The monitoring precision of the surface acoustic wave sensor frequency-temperature analytical time domain algorithm can be so high that the precision can be within 1 DEG C.
Description
Technical field
The present invention relates to a kind of frequency-temperature and resolve Time-Domain algorithm, relate in particular a kind of surface acoustic wave sensor frequency-temperature and resolve Time-Domain algorithm.
Background technology
Surface acoustic wave sensor is passive device, is the emerging advanced sensors growing up in recent years, and is just obtaining swift and violent development.Surface acoustic wave sensor has advantages of that common sensor does not have, and is particularly suitable for remote measurement and the sensing of some specific environments that can not contact.Surface acoustic wave sensor is divided into two types by detecting principle: delaying type and mode of resonance.But most of passive wireless sensor research concentrates on principle and the application problem research of delaying type and mode of resonance surface acoustic wave sensor.Because the electromagnetic energy of spatial excitation is limited, the small volume of sensor, surface acoustic wave sensor is more and more extensive in the application in temperature monitoring field.In intelligent grid field, be very important to the monitoring of temperature.But, the temperature monitoring field in switch cubicle, it is very high to the accuracy requirement of temperature monitoring, and how realizing the measuring accuracy of temperature is a good problem to study.
Summary of the invention
For overcoming the described problem to temperature detecting precision, the invention provides a kind of surface acoustic wave sensor frequency-temperature and resolve Time-Domain algorithm, its variation according to frequency parses the temperature in switch cubicle, and its monitoring accuracy is high, and its precision can be 1
oin C.
For solving above-mentioned technical matters, the present invention by the following technical solutions:
Surface acoustic wave sensor frequency-temperature is resolved Time-Domain algorithm, and it comprises the steps:
Step 1: the natural frequency f that determines surface acoustic wave sensor
0;
Step 2: make the reflection frequency f of surface acoustic wave sensor equal natural frequency f
0;
Step 3: determine the relation between temperature and reflection frequency, the relation between frequency and the temperature of described surface acoustic wave sensor can represent with following formula: f
0(T)=f
0(T
0) [1+a
f (1)(T-T
0)+a
f (2)(T-T
0)
2+ a
f (3)(T-T
0)
3+ ... ], wherein, a
f (i) wfor reference temperature T
0lower i rank temperature coefficient;
Step 4: draw temperature value according to the relation between temperature and reflection frequency.
Further technical scheme is:
In step 1, determined by following formula: f
0=V
s/ 2L, wherein V
sfor the velocity of propagation of surface acoustic wave in piezoelectric, the interelectrode spacing that L is surface acoustic wave sensor.
In step 3, surface acoustic wave sensor is-25
oc-100
oCtemperature coefficient in temperature range is as follows: a
f (1)=31*10
-6/
oC, a
f (2)=-2.1*10
-14 oC.
In step 3, ignore above of 2 rank, the relation between the frequency of surface acoustic wave sensor and temperature can be represented with following formula: f
0(T)=f
0(T
0) [1+a
f (1)(T-T
0)+a
f (2)(T-T
0)
2].
Compared with prior art, the invention has the beneficial effects as follows:
The present invention utilizes the relation decomposing of reflection frequency and temperature to go out temperature, makes its monitoring accuracy to temperature high, and its precision can be controlled in 1
oin C.
Embodiment
Embodiments of the present invention include but not limited to the following example.
[embodiment]
Surface acoustic wave sensor frequency-temperature is resolved Time-Domain algorithm, and it comprises the steps:
Step 1: the natural frequency f that determines surface acoustic wave sensor
0;
Step 2: make the reflection frequency f of surface acoustic wave sensor equal natural frequency f
0;
Step 3: determine the relation between temperature and reflection frequency, the relation between frequency and the temperature of described surface acoustic wave sensor can represent with following formula: f
0(T)=f
0(T
0) [1+a
f (1)(T-T
0)+a
f (2)(T-T
0)
2+ a
f (3)(T-T
0)
3+ ... ], wherein, a
f (i) wfor reference temperature T
0lower i rank temperature coefficient;
Step 4: draw temperature value according to the relation between temperature and reflection frequency.
In step 1, determined by following formula: f
0=V
s/ 2L, wherein V
sfor the velocity of propagation of surface acoustic wave in piezoelectric, the interelectrode spacing that L is surface acoustic wave sensor.
In step 3, surface acoustic wave sensor is-25
oc-100
oCtemperature coefficient in temperature range is as follows: a
f (1)=31*10
-6/
oC, a
f (2)=-2.1*10
-14 oC.
In step 3, ignore above of 2 rank, the relation between the frequency of surface acoustic wave sensor and temperature can be represented with following formula: f
0(T)=f
0(T
0) [1+a
f (1)(T-T
0)+a
f (2)(T-T
0)
2].
Above-mentioned steps can parse temperature value according to the variation of reflection frequency, and its monitoring accuracy is high, to the measuring accuracy of temperature 11
oin C.
Be as mentioned above embodiments of the invention.The present invention is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (4)
1. surface acoustic wave sensor frequency-temperature is resolved Time-Domain algorithm, it is characterized in that: it comprises the steps:
Step 1: the natural frequency f that determines surface acoustic wave sensor
0;
Step 2: make the reflection frequency f of surface acoustic wave sensor equal natural frequency f
0;
Step 3: determine the relation between temperature and reflection frequency, the relation between frequency and the temperature of described surface acoustic wave sensor can represent with following formula: f
0(T)=f
0(T
0) [1+a
f (1)(T-T
0)+a
f (2)(T-T
0)
2+ a
f (3)(T-T
0)
3+ ... ], wherein, a
f (i) wfor reference temperature T
0lower i rank temperature coefficient;
Step 4: draw temperature value according to the relation between temperature and reflection frequency.
2. surface acoustic wave sensor frequency according to claim 1-temperature is resolved Time-Domain algorithm, it is characterized in that: in step 1, determined by following formula: f
0=V
s/ 2L, wherein V
sfor the velocity of propagation of surface acoustic wave in piezoelectric, the interelectrode spacing that L is surface acoustic wave sensor.
3. surface acoustic wave sensor frequency according to claim 1-temperature is resolved Time-Domain algorithm, it is characterized in that: in step 3, surface acoustic wave sensor is-25
oc-100
oCtemperature coefficient in temperature range is as follows: a
f (1)=31*10
-6/
oC, a
f (2)=-2.1*10
-14 oC.
4. surface acoustic wave sensor frequency according to claim 3-temperature is resolved Time-Domain algorithm, it is characterized in that: in step 3, ignore above of 2 rank, the relation between the frequency of surface acoustic wave sensor and temperature can be represented with following formula: f
0(T)=f
0(T
0) [1+a
f (1)(T-T
0)+a
f (2)(T-T
0)
2].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310568587.1A CN103792020A (en) | 2013-11-15 | 2013-11-15 | Surface acoustic wave sensor frequency-temperature analytical time domain algorithm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310568587.1A CN103792020A (en) | 2013-11-15 | 2013-11-15 | Surface acoustic wave sensor frequency-temperature analytical time domain algorithm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103792020A true CN103792020A (en) | 2014-05-14 |
Family
ID=50667899
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|---|---|---|---|
| CN201310568587.1A Pending CN103792020A (en) | 2013-11-15 | 2013-11-15 | Surface acoustic wave sensor frequency-temperature analytical time domain algorithm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289096A (en) * | 2020-02-24 | 2020-06-16 | 杭州电子科技大学 | Method for determining optimal working frequency of surface acoustic wave device based on temperature frequency curve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101180524A (en) * | 2005-05-20 | 2008-05-14 | 传感技术有限公司 | Saw based torque and temperature sensor |
-
2013
- 2013-11-15 CN CN201310568587.1A patent/CN103792020A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101180524A (en) * | 2005-05-20 | 2008-05-14 | 传感技术有限公司 | Saw based torque and temperature sensor |
| US7795779B2 (en) * | 2005-05-20 | 2010-09-14 | Transense Technologies Plc | Saw torque and temperature sensor |
Non-Patent Citations (4)
| Title |
|---|
| 李平: "声表面波谐振器型无源无线温度传感器", 《仪器仪表学报》 * |
| 李源: "一种新型声表面波温度传感器的研究", 《清华大学学报（自然科学版）》 * |
| 胡兰芳: "声表面波温度传感器研究", 《西南民族学院学报•自然科学版》 * |
| 胡兰芳: "声表面波温度传感器研究", 《西南民族学院学报•自然科学版》, vol. 27, no. 1, 28 February 2001 (2001-02-28), pages 53 - 56 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289096A (en) * | 2020-02-24 | 2020-06-16 | 杭州电子科技大学 | Method for determining optimal working frequency of surface acoustic wave device based on temperature frequency curve |
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Application publication date: 20140514 |